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BUG: KMSAN: uninit-value in tctx_task_work+0x738/0xd00 fs/io_uring.c:2247
 tctx_task_work+0x738/0xd00 fs/io_uring.c:2247
 task_work_run+0x173/0x2b0 kernel/task_work.c:164
 tracehook_notify_signal include/linux/tracehook.h:214 [inline]
 handle_signal_work kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop+0x1b5/0x490 kernel/entry/common.c:173
 exit_to_user_mode_prepare kernel/entry/common.c:208 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x7e/0xc0 kernel/entry/common.c:302
 do_syscall_64+0x60/0xd0 arch/x86/entry/common.c:88
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:524 [inline]
 kmem_cache_alloc_bulk+0xe54/0x1480 mm/slub.c:3747
 __io_alloc_req_refill+0x482/0x867 fs/io_uring.c:2015
 io_alloc_req_refill fs/io_uring.c:2041 [inline]
 io_submit_sqes+0x7ab/0xfc0 fs/io_uring.c:7356
 __do_sys_io_uring_enter fs/io_uring.c:10070 [inline]
 __se_sys_io_uring_enter+0x62f/0x23c0 fs/io_uring.c:10012
 __x64_sys_io_uring_enter+0x19d/0x200 fs/io_uring.c:10012
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x44/0xae

CPU: 0 PID: 6478 Comm: syz-executor664 Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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